Abrading machine



Patented July 5, 1932 UNITED s'nvnas JOHN W. cosGRovE, DEcnAsED, LATE oF Mannoia); MASSACHUSETTS, BY CAROLINEE,

PATENT OFFICE COSGROVE, ADMINISTRATRIX, OF MEDFORD, MASSACHUSETTS, ASSIGNOR TO `'UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEWT` ERSEY, A CORPORATION OF NEW JERSEY Application filed March 6,

tool will contact with other parts of the heels or of the shoes which must not be scoured. This work is preferably done upon machines utilizing inflated tools becauseof the softness of the touch of a tool in which the abrasive cover is supported upona cushion of air, but

the dimensions of the available inflated tools v have been such that the breasts of certain heels could not be treatedm y Accordingly, an object of the invention is to provide an elongated, rotatable, abrading tool of the inflated type having a greatly reduced cross-section. MoreJ particularly the invention aims to provide a rotatable, resilient, abrasive tool of simple construction adapted to be mounted upon a supporting spindle and having its, component parts so arranged that the requisite mechanical strength is provided for all of these parts and the cross-sectional size of the tool is `kept at a minimum.

The resilient casing of the illustrated tool is provid-ed at one end with an enlarged portion or ange for cooperation with a shouli dered supporting spindle and, in accordance with a feature of the invention, means are provided for clamping this enlarged portion against a shoulder upon the spindle and for positively preventing twisting or rotational movement of the enlarged portion with re- Spect to the spindle. n

Another feature of the invention consists inproviding improved means for holding an abrasive cover, such as a sleeve of emery cloth upon thetool. In the illustrated construction a resilient casing is first mounted upon the spindle to support the abrasive cover and this casing, as well as the cover itself, is secured to the spindle by -means constructed and arranged to make an air-tight joint between the resilient casing and the spindle so that the former may be inflated. i

ABRADING MACHINE 1928. Serial No. 259,538.

Another feature of the inventionresides e means for holdingthe free or outer end of a resilient casing against twisting movement with respect to the spindle on which it is mounted. Since the cross-sectional dimenf' sions of the outer end of the casing which it is desired to holdagainst twisting movement are relatively small, this anti-twisting means, in the illustrated construction, talles the form of a rigid member of non-circular cross-,section, such as a piece of square tubing which is secured to the resilientcasing and ,.isar-Y ranged to fitr a non-circular portion of the' spindle. i

To adapt ent casing has a closed outer end. As a re-v sult7 the air pressure inside the tool pushesI against this end and tends to stretch the resilient casing axially of the spindle. In' or-A der to resisty this tendency, anti-stretching means is provided for preventing longitudinal movement with respect tothe spindle of the rigid nonfcircular member which issecured to the outer end of thecasing, said means extending to the clamped end of the casing and arranged to be secured by the same clamping device which holds the cas! ing and the'abrasive sleeve. c

These and other features Yof the invention Will now be set forth in detail withV reference to the accompanying drawing, in which Fig. 1 is a perspective view of the head of the machine having vatool of improved form mountedupon a horizontally arranged, spindle and disposed adjacent to a suction opening of the machine;` f Fig. 2 isa side elevation ofthe abrading tool with parts broken away and in 's`e`c' tion;an`d i Fig. 3 is an exploded view showing a portion of the end of the spindle, the'resilient casing with its anti-twisting and its anti` stretching means, and the flanged-'abrasive cover adapted to be clamped in position thereupon.

The illustrated machine, .which is of the Wellknown Naumkeag type, is lprovided with a suction opening 10, `an air-pressure chamber 12, a driving "belt 14;,'and a rotatable tool-carrying spindle 16,the spindlel the w01V for maaien, theme11! Y tion opening 10, in an auxiliary frame 20 supported byl a fixed bracket 22 comprising a series of pipes 24 and elbows 26. One portion of the bracket comprises an elbow T 28 by means of which there is supporteda stub shaft 30 carrying idler pulleys 32. Other idler pulleys 34 are mounted upon an adjustable arm 36 to carry a belt 38 to pulleys 40 upon the tool spindle 16. By mounting the tool 18 for rotation about a horizontal axis, the operator is able to present the breast of the heel with the shoe held in such a position thatthe tread face`V of the sole is uppermost and the breast of the heel facing the operator. This makes it easy for the operator to inspect` the portion of the shoe being'tre'ated.

, The spindle 16 ofthe machine is enlarged at 42 to form a shoulder 44 for cooperation with a resilient casing or pad 46. This casing, which is closed at its outer end and is preferably made of molded rubber, is provided with an enlargement or flange 48. An air-tight joint iselfected between the spindle and the inner end of the casing by a collar 5 0. The collar 50, which bears against an anti-friction washer 52 and is internally threaded to engage a threaded portion 54 u pon the spindle, clamps the flange 48 of the casing against the shoulder 44 of the spindle, It will be understood that the spindle 16 is provided with an internal air passage 56 terminating in an air-outlet opening 58 provided inside the resilient casing 46 to allow the iniation of this casing. This passage communicates with the pressure chamber 12 through the pipes 24 and a hollow bearing in the auxiliary frame 20. The outer or left endl ofthe spindle 16, as viewed in 1, upon which the tool is supported, is tapered or conical, as shownat 60, and receives the tubular casing or pad 46 tapered internally and externally in the same direction as the spindle, which is about one-half inch in diameter at its larger end and is reduced to as little as one-quarter inch in diameter at its smaller end thereby to provide a tool the dimensions of which shall render 'of some types of Louis heels.

Because of the very considerable torsional strains upon the casing when work, is pressed against the tool, means are provided for preventing a twisting of either the inner or the ,outer end of thercasing 46 with respect to the spindle. Tothis end a dowel pin 62 is arranged to project Yfrom the shoulder 44 of the spindle and the fiange 48 upon the casmeans of a rigid member 68 of non-circulary cross section secure-d to the rubber casing 46 and arranged to slip on to a co-operat-ing non-circular end portion 66 of the spindle as the` pad is applied thereto. This end portion 66 is shown as `square to receive the rigid member 68 which, as illustrated, is in the form of apiece of square brass tubing perforated` at 72 to allow the rubber of the outer end 7 0 of the casing, while the casing is being molded to shape, to unite firmly with the tubing 68 by fiowing into the perforations.

The air pressure which is applied to inflate the casing of the tool tends not only to increase its diameter but as well to stretch it axially of the spindle. This tendency is prevented in the illustrated tool by anti-stretch means comprising a wire loop 74 passing through openings 76 in the square tubing 68 and extending along the molded rubber of the casing to its inne-r end where the ends 78 of the wire loop are turned outwardly within the ange 48 of the casing so that they are engaged by the clamping mechanism for the Vinner end of the casing, thereby positively preventing any elongation of the casing as a result of the air pressure applied.L

The construction described imparts the necessarymechanical strength lto a tool the dimensions of the outer end of which are less than can safely be utilized for the inner end which is to be clamped to the spindle. The tool is, therefore, especially suited for its intended use on the .sharply curved breasts of some types of Louis heels.

A conical abrasive sleeve 80 is supported upon the conical resilient casing 46, this conical sleeve being held frictionally against a considerable strain. Additional means has also been provided for holding the abrasive sleeve 80 firmly in position upon the tool. To this end the innerA end of the abrasive sleeve is slitted to form tabs which are turned outwardly at right angles vto the axis of the sleeve to form a flange 82. The dimensions of the sleeve are such that when the tool is deiated, the sleeve may readily be slipped over theconical casing 46 to bring the flange 82 of the sleeve into enga-gement with the flange 48 of the casing, the washer 52 being then placed in position over both the sleeve and the casing, and the collar 50 being threaded on the spindle so as tightly to clamp both the sleeve and the casing. The collar 50 may, if desired, Vbe provided with wrench sockets 84 to enable a spanner wrench toengage it and turn it tightly into clamped position.

In the operation of the machine, the spinrear side of that tool. It will be understood` tha-tithe shoe is moved up and downto present the various portions of the breast of the heel to the tooland that by reason of 'the small dimensions of the tool, the operator is able to scour all parts of the breast of the heel withoutdanger of damaging other portions of the shoe.

Having described the invention, what I claim as new and desire to secure by Letter Patent of the United States is: Y

l. In an abrading machine, a hollow rotary spindle supported at one end with its other end free, a resilient inflatable casing covering the free end of said spindle and having a closed end, an abrasive cover over said resilient casing, and means holding both said casing and said cover on the spindle constructed and arranged to effect an air-tight joint between the casing and the spindle.

2. In an abrading machine, a rotary bung tool comprising an elongated tubular tapered pad of yieldable material having its large end open, a tapered abrasive cover therefor, and a rotary driving spindle for said pad secured to both ends of said pad, said spindle extending into the large open end of said pad and terminating within said pad at a Vpoint adjacent to the small end thereof.

3. In an abra-ding machine, a rotary bufiing tool comprising an elongated tubular pad having its outer end smaller than its inner end, said pad being tapered internally and veX` ternally in the same direction, and a rotary driving spindle extendingl into said padand tapered in the same direction as said pad,

said pad.

4;. In an abrading machine,arotary spindle su ported at one end andhaving a noncir cu ar cross-section at its free end, a resilient Y casing on said spindle provided with a rigid member adjacent to one end adapted to iit over the non-circular endk of the spindle, means for clamping said casing to the spindle, and an abrasive sleeve on said casing.

5. In an abrading machine, a rotary spindle, a resilient casing on said spindle, and means for preventing twisting of one end of said casing with respect to thespindle cornprising a rigid member secured to said end'of said casing and adapted to co-operate with a portion of the endof the spindle, said rigid member and said portion of the spindle having co-operating complementary portions of polygonal cross-section.

v6. In an abrading machine, a rotary spindle, a resilient casing'on'said spindle,

means for` preventing twisting ofone end of said casing with respect to the spindle comprising a rigid member secured to the end of said casing and adapted to co-operate with a portion of the end of the spindle, said rigidy member and said portion ofthespindle having co-operating complementary portions of polygonal cross-section, and means for .clamping the other end of the casing to the spindle.

7. v In an abrading,y machine', a 1 rotary spindle havinga squared tip, a resilient casy ing adapted to be placed on-said spindle and having a hollowmember secured to the outer end of the casingand-adaptedto be engaged with and tythe squaredtip of said spindle,

and means for clampingsaid casing to said spindle.; f

- 8. A scouringtool adapted to be mountedv upon ayrotary driving means and comprising` an elastic supporting casing arranged to support an abrasive cover, and a tubularinsertJ Within and attached to said supportingL casing, said insert being constructed and arrangedy to lco-operate with a drivingl means thereby to prevent twisting of the outer end of the supporting casing with respect to said means. f 9. A scouringtool comprising a resilient supporting casingone end of which is adapt-- ed to be secured to a rotary spindle, and antitwisting means sleeved onl said spindle and sec-ured to the other end of the supporting cas-V ing constructed and arranged to holdv the outer end of said casing against rotation with respectto thespindle. y, ,f s

,10. A rotary buiiing tool,comprising an elongated pad of yieldablemolded material, and a rigid hollow member 'of. internal and external non-circular cross-section, the material of said-pad at one endxthe'reof being molded about said rigid member non-rotatably to secure said end of said pad to said member and the interior offsaidmember being adapted to engagea complemental nonf circular shank on a rotary drive member nonrotatably'tocouple said rigid member to said` drive member torrotate said end. of said pad.

11. A rotary buing tool, comprising an elongatedV tapered pad-of yieldabl'e material, and a rigid Vmember having'a'portion vof noncircular cross section, Ithe material of the pady at thesmall end thereof being molded about said rigid member to secure saidendof said' pad to saidmember, and said memberbeing constructed and arranged t0 Provide fork nonrotary attachmentto a rotary driving means.

12'. A rotary buihng tool, comprising an elongated padof yieldable material, and a rigidtubularmember having perforated portions, -the material of said pad at one end thereof being molded` about said rigid finember'andinto the perforations thereofto in# sure a positivevinterlocking bond Y between said pad4 and said member,4 ,f and means jfor iso attaching said member to a rotary driving means.

13. In an abrading machine, a rotary spin-` means for clamping said open end of said pad to said spindle, and a pin extending into the material of said pad-adjacent to said open end thereof and engaging said spindle for positively preventing rotation vof said open end of said pad relative toV said spindle.

14. Inv an abrading machine, a rotatable spindle havinga shoulderfa scouring tool comprising a resilient casing adapted to support-an abrasive cover and provided at o-ne end' 'with an` enlarged portion, means for clamping said enlarged portion of the `casing against said shoulder, and means'for positively preventing twisting of the enlarged Y portion with respect to the spindle.

15. In an abrading machine, a rotatable spindle having a shoulder, a scouring tool comprising a resilient casing provided at one end with an enlarged'portion and adapted to support an abrasive cover, means for clamping said yenlarged portion of the casing against said shoulder, and means for preventing twisting of both ends of the resilient supporting casing with respect to the Spindle.

v16. In an abrading machine, a hollow spindle rotatably supported at one end and having a shoulder near said end, the tip of said spindle being squared, an elastic casing on said spindle having a flanged portion forengagement with said shoulder and having secured thereto a piece. of square rigid tubing for engagement with said tip, means for clamping the flanged portion of said casing to said shoulder on-the spindle, and an abrasive cover over said casing.

17. In an abrading machine, a hollow'spindle rotatably supported at one end and having a shoulder near said end, the tip 'of said spindle being squared, an inlatable-elastic casing for saidspindle having a flanged portion for engagement with said shoulder and provided with a piece of square tubing constructed :and arranged to engage said tip to prevent relative twisting of the outer end of thecasing and the tip, means for clamping said casingto said spindle constructed and arranged positively to preventrelative twisting of the inner end ofV the casing and the spindle, an abrasive cover for said'casing, and means extending from said tubing to said clamping means arranged to prevent axial ,stretching jof the casing.

18. In an abrading machine, a rotatable spindle, a scouring tool comprising -a resilient supporting casing arranged to receive an abrasive cover, means for clamping one endv of said casing to the spindle, anti-twisting means for preventing twisting of the other end ofthe casing', and means coacting with said clamping means for securing said `antitwisting means against movement axially of thespindle. .A

19. In an abrading machine, a hollow spindlerotatablysupported atrone end and hav-- ing its free end provided with a shoulder, the l tip of'said spindleybeing squared and said spindle being provided vwith air-outlet openings between the tip andthe shoulder, an inflat-able elastic casing for the free end of said spindle having a flanged end adapted to abut against the shoulder on the spindle, a square tubing secured to the free end of said casing andy adapted to besleeved on the tip ofthe spindle to prevent twisting of the outer end of the casing,a .wire secured to said tubing and extending to the flange of the casing, a collar for clamping said flange and the wire against the shoulder of the spindle, and an abrasive cover for said casing.

20. A rotary buliing tool, comprising an elongated pad of yieldable material and having an inner and an outer end, said inner end being adapted to be secured against botlirotary and axial movement to a rotary driving means, a rigid member secured against rotary and axial movementY to the outer endV of said pad and being adapted to non-rotary attachment to said driving means, and a wire loop adaptedto be held by said driving means for securing said member against axial movement to said driving means.

21. In an abrading machine, a rotary spindle, an inflatable resilient casing on said s )indle, means for clampin g the inner end o the casing to the spindle, la rigid member secured against rotary and axial movement to the 'outer end of said pad and being adapted for non-*rotary attachment to said driving means, and means within said-casing arranged to prevent'longitudinal movement of the rigid member at the end of the casing with respect to the spindle.' i 22. In an abrading machine, a rotatable spindle, a scouring tool adapted to be supported upon-said spindle, said tool comprising a resilientsupporting casing for. an abrasive cover, meansfor clamping one end of said supporting casing to the spindle, and means extending kfrom and held by said clamping means constructed and arranged to hold said ysupporting casingagainst stretching axially of the spindle. 23.. A scouring tool adapted to be supported upon a rotary drivingmeans, said tool comprisinof a supporting casing-,of resil-ient material adapted to be detachably secured to said driving means at one end, and metallic means carried .by said casing and extending lengthwise of the `supporting casing arranged. to prevent axial stretching of thecasing;

`24. In a buliing-machine, a rotary spindle, a resilientcasing having any open end, said spindle extending into said 'casing through said openl end gthereof, means ufor securing said casing atk the open end thereof to said spindle to prevent relative longitudinal and rotary displacement between said end of said easing and said spindle, a member secured to the opposite end. ofV said casing, said member and said spindle having cooperating complementary portions of non-circular crosssection for preventing relative rotary displacement between said opposite end of said casing and said spindle, and means for preventing longitudinal displacement between said opposite end of said Casing and said spindle.

25. In an abrading machine, a spindle rotatably supported at one end and having its other end free, a yieldable easing mounted on said spindle and adapted to receive and support an abrasive cover, means for clamdping one end of said casing to said spin le at a locality remote from the free end of the spindle, the other end of said casing extending beyond the free end of the spindle, and a member secured to said spindle and having a tubular portion within said yeldable casing attached to said other end of said'casing and slidably mounted over the free end of said spindle for supporting said casing,

In testimony whereof I have'signed'my name to this specilication. f 3o CAROLINE E. COSGROVE.

Admz'nsmzfm'feof he Estate of Jaim W. 0 osgrove, Deceased. 

